132 
IOWA ACADEMY OP SCIENCES. 
upper end, branched. All along sides of the canal are minute 
projections which sub-divide, forming three or more branching 
canals. The “sub-palisade” portion consists of four layers of 
small, round cells, with a small chain-like layer also between 
“sub-palisade” and endosperm. Endosperm consists of large, 
irregular cells. Measurements — achenium, 128. 6u; “palisade” 
cells, 108. 9u; “sub-palisade,” 29. 7u. 
Eriogonum sp? 
Figure 7, plate ix. 
In Eriogonum the “palisade” cells are narrow and not very 
long; rectangular in shape, and regularly arranged; the cell- 
cavity is situated at the lower end of the “palisade” cells, and 
extends only half its length; the cavity is broad at the base, fill- 
ing the whole width of the cell, but tapers to a point at the upper 
end. The cell is light colored, while the cell-cavity is of a 
deep brown color. The “sub-palisade” consists of two layers 
of cells, slightly oval in shape, and regularly arranged. The 
endosperm consists of large cells, nearly as broad as long. 
Polygonella gracilis, Meisner. 
Figure 8. plate ix. 
In this species the “palisade” cells are nearly square, being 
only a trifle longer than broad. The cell-cavity runs nearly 
the whole length of “palisade cell”, is quite broad and ends in 
forked canals, which run nearly to the end of cell. The cell 
walls are light in color, while cavity is somewhat darker. The 
“sub-palisade” portion consists of round, slightly elongated 
cells, vrhich are quite small. The endosperm consists of cells 
a trifle larger than broad and arranged somewhat irregularly. 
Measurements — achenium, 59. 4u; “palisade,” 33u; “ sub-pali- 
sade,” 26. 4u. 
Brminichia cirrlwsa, Banks. 
Figure 9, plate viii. 
In the specimens of Brunnichici cirrhosa very long, broad “pal- 
isade” cells occur. The cell-cavity is large and nearly square. 
A delicate layer of cells occurs between “palisade” and “sub- 
palisade” layers, beaded in appearance. The “sub-palisade” 
cells are nearly square and are regularly arranged. The 
endosperm cells are large rectangular, irregularly placed. 
Measurements — achenium, 141. 9u; “palisade” cells, 99. u; “sub- 
palisade,” 42. 9u. 
